You can buy recessed LED cans with remote drivers. It’s not super common, but they exist in commercial installations. The largest LED drivers that I am familiar with are 24VDC/96w which is enough for (12) 8w recessed cans.

Individual drivers per fixture allow flexibility with regards to commercial lighting control. The 0-10V dimming signal is sent to the driver, and if you have multiple fixtures per driver, they will all dim together. This behavior can be accomplished with individual LED drivers by wiring the dimming signal in parallel to each driver from the dimming module.

Line voltage circuits can handle a lot of fixtures, particularly at 230V or 277V. A 277V 20A circuit can continuously power 554 8w recessed cans or 138 32w 2x4s on a single pair of #12/2.5mm^2 wire. Two of those circuits can power all of the lights in a 20,000 square foot office.